Directions for taking notes on a computer:

- Create a folder.

- Create notes as files named like tweets `my note #javascript #yolo.txt`.

- Write markdown in plain text files.

- Open the folder from your choice of editor.

- Distribute your notes folder using Git, Dropbox, Drive, etc.

- Enjoy your notes FOREVER.

Atom works great when you need your notes in a Desktop environment. The command line is wonderful when you are on a server. Byword is amazing on iPhone. Nothing great I've found for Android yet.